<template>
    <div class="login_container">
        <el-row>
            <el-col :span="12" :xs="0"></el-col>
            <el-col :span="12" xs="24">
                <el-form :rules="rules" class="login_form" :model="loginForm" ref="loginForms">
                    <h1>Hello</h1>
                    <h2>欢迎来到硅谷甄选</h2>
                    <el-form-item prop="username">
                        <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
                    </el-form-item>
                    <el-form-item prop="password">
                        <el-input show-password type="passsword" :prefix-icon="Lock"
                            v-model="loginForm.password"></el-input>
                    </el-form-item>
                    <el-form-item>
                        <el-button :loading="loading" class="login_btn" type="primary" size="default"
                            @click="login">登录</el-button>
                    </el-form-item>
                </el-form>
            </el-col>
        </el-row>

    </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue';
import { reactive, ref } from 'vue';
import useUserStore from '@/store/modules/user'
import { useRouter, useRoute } from 'vue-router';
import { ElNotification } from 'element-plus';
import { getTime } from '@/utils/time'
let $router = useRouter()
let $route = useRoute()
let useStore = useUserStore()
// 获取el-form表单组件实例
let loginForms = ref()
// 收集账号密码
let loginForm = reactive({
    username: 'admin',
    password: 'atguigu123'
})
// 控制按钮加载效果
let loading = ref(false)
// 登录按钮的回调
const login = async () => {
    // 保证全部表单校验通过
    await loginForms.value.validate()
    loading.value = true
    try {
        await useStore.userLogin(loginForm)
        let redirect: any = $route.query.redirect
        $router.push({ path: redirect || '/' })
        ElNotification({
            type: 'success',
            message: '欢迎回来',
            title: `${getTime()}好`
        })
        loading.value = false
    } catch (error) {
        loading.value = false
        ElNotification({
            type: 'error',
            message: (error as Error).message
        })
    }
}
//自定义校验规则函数
const validatorUserName = (_: any, value: any, callback: any) => {
    //rule:即为校验规则对象
    //value:即为表单元素文本内容
    //函数:如果符合条件callBack放行通过即为
    //如果不符合条件callBack方法,注入错误提示信息
    if (value.length >= 5) {
        callback();
    } else {
        callback(new Error('账号长度至少五位'));
    }
}

const validatorPassword = (_: any, value: any, callback: any) => {
    if (value.length >= 6) {
        callback();
    } else {
        callback(new Error('密码长度至少六位'));
    }
}

//定义表单校验需要配置对象
const rules = {
    //规则对象属性:
    //required,代表这个字段务必要校验的
    //min:文本长度至少多少位
    //max:文本长度最多多少位
    //message:错误的提示信息
    //trigger:触发校验表单的时机 change->文本发生变化触发校验,blur:失去焦点的时候触发校验规则
    username: [
        // { required: true, min: 6, max: 10, message: '账号长度至少六位', trigger: 'change' }
        { trigger: 'change', validator: validatorUserName }
    ],
    password: [
        // { required: true, min: 6, max: 15, message: '密码长度至少6位', trigger: 'change' }
        { trigger: 'change', validator: validatorPassword }
    ]
}
</script>

<style scoped lang="scss">
.login_container {
    width: 100%;
    height: 100vh;
    background: url('@/assets/images/background.jpg')no-repeat;
    background-size: cover;

    .login_form {
        position: relative;
        width: 80%;
        top: 30vh;
        background: url('@/assets/images/login_form.png') no-repeat;
        background-size: cover;
        padding: 40px;

        h1 {
            color: white;
            font-size: 40px;
        }

        h2 {
            font-size: 20px;
            color: white;
            margin: 20px 0px;
        }

        .login_btn {
            width: 100%;
        }
    }
}
</style>